/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:26:29,579 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:26:29,582 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:26:29,620 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:26:29,621 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:26:29,629 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:26:29,630 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:26:29,634 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:26:29,636 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:26:29,639 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:26:29,640 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:26:29,641 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:26:29,641 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:26:29,644 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:26:29,646 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:26:29,647 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:26:29,649 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:26:29,650 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:26:29,651 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:26:29,659 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:26:29,661 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:26:29,662 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:26:29,663 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:26:29,664 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:26:29,670 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:26:29,670 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:26:29,670 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:26:29,671 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:26:29,671 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:26:29,672 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:26:29,677 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:26:29,678 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:26:29,679 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:26:29,679 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:26:29,682 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:26:29,682 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:26:29,683 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:26:29,683 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:26:29,684 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:26:29,684 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:26:29,685 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:26:29,686 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 23:26:29,707 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:26:29,707 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:26:29,708 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:26:29,708 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:26:29,708 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:26:29,709 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:26:29,709 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:26:29,709 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:26:29,709 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:26:29,709 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:26:29,710 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:26:29,710 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:26:29,710 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:26:29,710 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:26:29,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:26:29,711 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:26:29,711 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:26:29,711 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:26:29,711 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:26:29,711 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:26:29,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:26:29,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:26:29,712 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:26:29,712 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:26:29,712 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:26:29,713 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:26:29,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:26:29,713 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:26:29,713 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:26:29,713 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:26:30,029 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:26:30,048 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:26:30,052 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:26:30,055 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:26:30,056 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:26:30,057 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-2.i [2020-10-13 23:26:30,129 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2b52f153f/c2794994a88d40b49ed6c31cb54d3ccb/FLAG7e4e79578 [2020-10-13 23:26:30,610 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:26:30,610 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-2.i [2020-10-13 23:26:30,617 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2b52f153f/c2794994a88d40b49ed6c31cb54d3ccb/FLAG7e4e79578 [2020-10-13 23:26:30,974 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2b52f153f/c2794994a88d40b49ed6c31cb54d3ccb [2020-10-13 23:26:30,982 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:26:30,984 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:26:30,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:26:30,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:26:30,989 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:26:30,991 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:26:30" (1/1) ... [2020-10-13 23:26:30,994 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ce0c36b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:26:30, skipping insertion in model container [2020-10-13 23:26:30,994 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:26:30" (1/1) ... [2020-10-13 23:26:31,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:26:31,023 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:26:31,237 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:26:31,242 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:26:31,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:26:31,387 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:26:31,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:26:31 WrapperNode [2020-10-13 23:26:31,388 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:26:31,389 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:26:31,389 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:26:31,389 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:26:31,405 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:26:31" (1/1) ... [2020-10-13 23:26:31,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:26:31" (1/1) ... [2020-10-13 23:26:31,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:26:31" (1/1) ... [2020-10-13 23:26:31,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:26:31" (1/1) ... [2020-10-13 23:26:31,444 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:26:31" (1/1) ... [2020-10-13 23:26:31,452 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:26:31" (1/1) ... [2020-10-13 23:26:31,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:26:31" (1/1) ... [2020-10-13 23:26:31,456 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:26:31,457 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:26:31,457 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:26:31,457 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:26:31,461 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:26:31" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:26:31,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:26:31,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:26:31,534 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:26:31,534 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:26:31,534 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:26:31,534 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:26:31,534 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 23:26:31,534 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:26:31,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:26:31,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:26:31,535 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:26:31,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:26:31,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:26:31,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:26:31,924 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:26:31,925 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-13 23:26:31,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:26:31 BoogieIcfgContainer [2020-10-13 23:26:31,929 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:26:31,930 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:26:31,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:26:31,934 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:26:31,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:26:30" (1/3) ... [2020-10-13 23:26:31,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@440b9a86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:26:31, skipping insertion in model container [2020-10-13 23:26:31,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:26:31" (2/3) ... [2020-10-13 23:26:31,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@440b9a86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:26:31, skipping insertion in model container [2020-10-13 23:26:31,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:26:31" (3/3) ... [2020-10-13 23:26:31,938 INFO L109 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-2.i [2020-10-13 23:26:31,949 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:26:31,956 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:26:31,971 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:26:31,995 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:26:31,995 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:26:31,996 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:26:31,996 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:26:31,996 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:26:31,996 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:26:31,996 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:26:31,997 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:26:32,016 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-10-13 23:26:32,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 23:26:32,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:32,024 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:32,024 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:32,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:32,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1156372912, now seen corresponding path program 1 times [2020-10-13 23:26:32,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:32,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289843571] [2020-10-13 23:26:32,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:32,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:32,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:32,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:32,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:32,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 23:26:32,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:26:32,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-13 23:26:32,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:32,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:32,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:32,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 23:26:32,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:32,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:26:32,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:32,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:32,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:32,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:32,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:32,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 23:26:32,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:32,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:32,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:32,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:32,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:32,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:32,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:26:32,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289843571] [2020-10-13 23:26:32,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:26:32,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:26:32,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681870385] [2020-10-13 23:26:32,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:26:32,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:32,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:26:32,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:26:32,429 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 3 states. [2020-10-13 23:26:32,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:32,588 INFO L93 Difference]: Finished difference Result 82 states and 123 transitions. [2020-10-13 23:26:32,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:26:32,590 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-13 23:26:32,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:32,600 INFO L225 Difference]: With dead ends: 82 [2020-10-13 23:26:32,601 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 23:26:32,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:26:32,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 23:26:32,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-13 23:26:32,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 23:26:32,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2020-10-13 23:26:32,650 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 16 [2020-10-13 23:26:32,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:32,651 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2020-10-13 23:26:32,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:26:32,651 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2020-10-13 23:26:32,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 23:26:32,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:32,652 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:32,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:26:32,653 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:32,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:32,653 INFO L82 PathProgramCache]: Analyzing trace with hash -2078459264, now seen corresponding path program 1 times [2020-10-13 23:26:32,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:32,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734815814] [2020-10-13 23:26:32,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:32,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:32,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:32,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:32,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:32,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 23:26:32,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:26:32,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-13 23:26:32,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:32,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:32,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:26:32,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:26:32,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:26:32,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 23:26:32,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:32,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:32,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:32,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:32,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:32,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:32,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:26:32,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:32,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:32,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:32,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:32,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:32,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:32,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:26:32,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734815814] [2020-10-13 23:26:32,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:26:32,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:26:32,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120444351] [2020-10-13 23:26:32,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:26:32,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:32,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:26:32,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:26:32,905 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 4 states. [2020-10-13 23:26:33,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:33,038 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2020-10-13 23:26:33,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:26:33,039 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-13 23:26:33,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:33,040 INFO L225 Difference]: With dead ends: 74 [2020-10-13 23:26:33,040 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 23:26:33,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:26:33,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 23:26:33,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-13 23:26:33,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 23:26:33,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2020-10-13 23:26:33,051 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 16 [2020-10-13 23:26:33,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:33,051 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2020-10-13 23:26:33,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:26:33,051 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2020-10-13 23:26:33,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 23:26:33,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:33,052 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:33,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:26:33,053 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:33,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:33,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1609541534, now seen corresponding path program 1 times [2020-10-13 23:26:33,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:33,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818259907] [2020-10-13 23:26:33,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:33,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:33,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:33,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:33,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:33,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 23:26:33,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:26:33,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-13 23:26:33,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:33,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:33,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:26:33,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 23:26:33,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:26:33,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:33,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:33,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:33,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:33,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:33,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:33,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:26:33,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:33,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:33,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:33,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:33,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:33,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:33,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:26:33,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818259907] [2020-10-13 23:26:33,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:26:33,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:26:33,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328117520] [2020-10-13 23:26:33,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:26:33,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:33,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:26:33,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:26:33,254 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand 4 states. [2020-10-13 23:26:33,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:33,382 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2020-10-13 23:26:33,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:26:33,382 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-13 23:26:33,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:33,384 INFO L225 Difference]: With dead ends: 72 [2020-10-13 23:26:33,384 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 23:26:33,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:26:33,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 23:26:33,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2020-10-13 23:26:33,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 23:26:33,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2020-10-13 23:26:33,395 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 18 [2020-10-13 23:26:33,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:33,395 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2020-10-13 23:26:33,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:26:33,396 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2020-10-13 23:26:33,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 23:26:33,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:33,397 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:33,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:26:33,397 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:33,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:33,398 INFO L82 PathProgramCache]: Analyzing trace with hash -898844059, now seen corresponding path program 1 times [2020-10-13 23:26:33,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:33,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621299896] [2020-10-13 23:26:33,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:33,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:33,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:33,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:33,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:33,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:33,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:33,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 23:26:33,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:26:33,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 448 [2020-10-13 23:26:33,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:33,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:33,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:26:33,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 23:26:33,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 23:26:33,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:33,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:33,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:33,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:33,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:33,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:33,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:26:33,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:33,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:33,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:33,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:33,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:33,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:26:33,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621299896] [2020-10-13 23:26:33,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:26:33,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:26:33,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045651565] [2020-10-13 23:26:33,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:26:33,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:33,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:26:33,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:26:33,922 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 4 states. [2020-10-13 23:26:34,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:34,119 INFO L93 Difference]: Finished difference Result 90 states and 119 transitions. [2020-10-13 23:26:34,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:26:34,122 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-13 23:26:34,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:34,123 INFO L225 Difference]: With dead ends: 90 [2020-10-13 23:26:34,123 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 23:26:34,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:26:34,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 23:26:34,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2020-10-13 23:26:34,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 23:26:34,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2020-10-13 23:26:34,138 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 20 [2020-10-13 23:26:34,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:34,138 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2020-10-13 23:26:34,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:26:34,139 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2020-10-13 23:26:34,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 23:26:34,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:34,141 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:34,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:26:34,142 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:34,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:34,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1708190685, now seen corresponding path program 1 times [2020-10-13 23:26:34,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:34,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122112695] [2020-10-13 23:26:34,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:34,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:34,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:34,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:34,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:34,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:34,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 23:26:34,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:26:34,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 242 [2020-10-13 23:26:34,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:34,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:34,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:26:34,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 23:26:34,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:26:34,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:34,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:34,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:34,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:34,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:34,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:34,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:34,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:26:34,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:34,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:34,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:34,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:34,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:34,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:34,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:26:34,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122112695] [2020-10-13 23:26:34,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:26:34,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 23:26:34,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248156252] [2020-10-13 23:26:34,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:26:34,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:34,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:26:34,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:26:34,441 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand 5 states. [2020-10-13 23:26:34,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:34,608 INFO L93 Difference]: Finished difference Result 97 states and 130 transitions. [2020-10-13 23:26:34,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:26:34,609 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-13 23:26:34,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:34,610 INFO L225 Difference]: With dead ends: 97 [2020-10-13 23:26:34,610 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 23:26:34,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:26:34,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 23:26:34,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2020-10-13 23:26:34,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 23:26:34,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 74 transitions. [2020-10-13 23:26:34,625 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 74 transitions. Word has length 20 [2020-10-13 23:26:34,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:34,626 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 74 transitions. [2020-10-13 23:26:34,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:26:34,626 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 74 transitions. [2020-10-13 23:26:34,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 23:26:34,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:34,627 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:34,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:26:34,628 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:34,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:34,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1397069005, now seen corresponding path program 1 times [2020-10-13 23:26:34,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:34,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34426891] [2020-10-13 23:26:34,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:34,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:34,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:34,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:34,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:34,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:35,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:35,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 23:26:35,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:26:35,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 553 [2020-10-13 23:26:35,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:35,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:35,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:26:35,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 23:26:35,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 23:26:35,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:35,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:35,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:35,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:35,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:35,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:35,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:35,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:26:35,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:35,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:35,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:35,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:35,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:35,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:35,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:26:35,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34426891] [2020-10-13 23:26:35,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:26:35,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 23:26:35,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104640787] [2020-10-13 23:26:35,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:26:35,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:35,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:26:35,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:26:35,271 INFO L87 Difference]: Start difference. First operand 56 states and 74 transitions. Second operand 6 states. [2020-10-13 23:26:35,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:35,662 INFO L93 Difference]: Finished difference Result 171 states and 235 transitions. [2020-10-13 23:26:35,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:26:35,662 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-13 23:26:35,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:35,664 INFO L225 Difference]: With dead ends: 171 [2020-10-13 23:26:35,664 INFO L226 Difference]: Without dead ends: 133 [2020-10-13 23:26:35,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:26:35,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-13 23:26:35,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 81. [2020-10-13 23:26:35,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 23:26:35,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 111 transitions. [2020-10-13 23:26:35,698 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 111 transitions. Word has length 21 [2020-10-13 23:26:35,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:35,698 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 111 transitions. [2020-10-13 23:26:35,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:26:35,698 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 111 transitions. [2020-10-13 23:26:35,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 23:26:35,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:35,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:35,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:26:35,703 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:35,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:35,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1657707546, now seen corresponding path program 1 times [2020-10-13 23:26:35,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:35,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924847304] [2020-10-13 23:26:35,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:35,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:35,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:35,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:35,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:35,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:36,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:36,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 23:26:36,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:26:36,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 739 [2020-10-13 23:26:36,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:36,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:36,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:26:36,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 23:26:36,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:26:36,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:36,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:36,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:36,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:36,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:36,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:36,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:36,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:26:36,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:36,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:36,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:36,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:36,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:36,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:36,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:26:36,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924847304] [2020-10-13 23:26:36,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:36,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:26:36,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242627787] [2020-10-13 23:26:36,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:26:36,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:36,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:26:36,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:26:36,500 INFO L87 Difference]: Start difference. First operand 81 states and 111 transitions. Second operand 6 states. [2020-10-13 23:26:36,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:36,692 INFO L93 Difference]: Finished difference Result 159 states and 221 transitions. [2020-10-13 23:26:36,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:26:36,692 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-13 23:26:36,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:36,693 INFO L225 Difference]: With dead ends: 159 [2020-10-13 23:26:36,693 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 23:26:36,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:26:36,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 23:26:36,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2020-10-13 23:26:36,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 23:26:36,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 117 transitions. [2020-10-13 23:26:36,705 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 117 transitions. Word has length 24 [2020-10-13 23:26:36,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:36,706 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 117 transitions. [2020-10-13 23:26:36,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:26:36,706 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 117 transitions. [2020-10-13 23:26:36,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 23:26:36,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:36,707 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:36,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:26:36,707 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:36,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:36,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1297776747, now seen corresponding path program 2 times [2020-10-13 23:26:36,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:36,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738942168] [2020-10-13 23:26:36,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:36,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:36,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:36,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:36,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:37,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:37,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:37,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 23:26:37,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:26:37,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1183 [2020-10-13 23:26:37,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:37,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:37,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:26:37,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:26:37,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:26:37,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:37,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:37,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:37,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:37,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:37,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:37,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:37,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:26:37,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:37,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:37,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:37,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:37,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:37,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:37,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 23:26:37,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738942168] [2020-10-13 23:26:37,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:37,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:26:37,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903143880] [2020-10-13 23:26:37,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:26:37,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:37,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:26:37,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:26:37,950 INFO L87 Difference]: Start difference. First operand 86 states and 117 transitions. Second operand 5 states. [2020-10-13 23:26:38,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:38,064 INFO L93 Difference]: Finished difference Result 166 states and 228 transitions. [2020-10-13 23:26:38,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:26:38,065 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-10-13 23:26:38,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:38,066 INFO L225 Difference]: With dead ends: 166 [2020-10-13 23:26:38,066 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 23:26:38,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:26:38,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 23:26:38,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-13 23:26:38,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 23:26:38,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 119 transitions. [2020-10-13 23:26:38,086 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 119 transitions. Word has length 27 [2020-10-13 23:26:38,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:38,089 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 119 transitions. [2020-10-13 23:26:38,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:26:38,089 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 119 transitions. [2020-10-13 23:26:38,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 23:26:38,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:38,090 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:38,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:26:38,091 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:38,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:38,091 INFO L82 PathProgramCache]: Analyzing trace with hash 907493705, now seen corresponding path program 3 times [2020-10-13 23:26:38,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:38,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303046765] [2020-10-13 23:26:38,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:38,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:38,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:38,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:38,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:38,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:39,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:39,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 23:26:39,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:26:39,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1698 [2020-10-13 23:26:39,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:39,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:39,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:26:39,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 23:26:39,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 23:26:39,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:39,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:39,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:39,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:39,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:39,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:39,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:39,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:26:39,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:39,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:39,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:39,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:39,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:39,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:39,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 23:26:39,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303046765] [2020-10-13 23:26:39,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:39,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:26:39,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003449769] [2020-10-13 23:26:39,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:26:39,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:39,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:26:39,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:26:39,868 INFO L87 Difference]: Start difference. First operand 88 states and 119 transitions. Second operand 7 states. [2020-10-13 23:26:40,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:40,062 INFO L93 Difference]: Finished difference Result 167 states and 231 transitions. [2020-10-13 23:26:40,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:26:40,063 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-13 23:26:40,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:40,064 INFO L225 Difference]: With dead ends: 167 [2020-10-13 23:26:40,064 INFO L226 Difference]: Without dead ends: 104 [2020-10-13 23:26:40,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:26:40,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-13 23:26:40,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2020-10-13 23:26:40,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-13 23:26:40,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 127 transitions. [2020-10-13 23:26:40,087 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 127 transitions. Word has length 29 [2020-10-13 23:26:40,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:40,087 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 127 transitions. [2020-10-13 23:26:40,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:26:40,088 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 127 transitions. [2020-10-13 23:26:40,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 23:26:40,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:40,089 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:40,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:26:40,090 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:40,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:40,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1607919396, now seen corresponding path program 4 times [2020-10-13 23:26:40,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:40,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768615229] [2020-10-13 23:26:40,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:40,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:40,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:40,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:40,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:40,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:42,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:42,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 23:26:42,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:26:42,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2255 [2020-10-13 23:26:42,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:42,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:42,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:26:42,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 23:26:42,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:26:42,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:42,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:42,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:42,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:42,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:42,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:42,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:26:42,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:42,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:42,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:42,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:42,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:42,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:42,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 23:26:42,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768615229] [2020-10-13 23:26:42,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:26:42,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 23:26:42,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885321876] [2020-10-13 23:26:42,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:26:42,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:42,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:26:42,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:26:42,430 INFO L87 Difference]: Start difference. First operand 94 states and 127 transitions. Second operand 7 states. [2020-10-13 23:26:42,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:42,619 INFO L93 Difference]: Finished difference Result 110 states and 146 transitions. [2020-10-13 23:26:42,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:26:42,619 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-13 23:26:42,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:42,621 INFO L225 Difference]: With dead ends: 110 [2020-10-13 23:26:42,621 INFO L226 Difference]: Without dead ends: 108 [2020-10-13 23:26:42,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:26:42,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-13 23:26:42,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 102. [2020-10-13 23:26:42,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 23:26:42,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 138 transitions. [2020-10-13 23:26:42,633 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 138 transitions. Word has length 32 [2020-10-13 23:26:42,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:42,634 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 138 transitions. [2020-10-13 23:26:42,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:26:42,634 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 138 transitions. [2020-10-13 23:26:42,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 23:26:42,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:42,642 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:42,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:26:42,642 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:42,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:42,643 INFO L82 PathProgramCache]: Analyzing trace with hash 247691932, now seen corresponding path program 1 times [2020-10-13 23:26:42,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:42,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715150644] [2020-10-13 23:26:42,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:42,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:42,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:42,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:42,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:42,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:42,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:42,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:42,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:42,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:42,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:43,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:43,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:43,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:47,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:47,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 23:26:47,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 23:26:47,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:26:47,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:47,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:47,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:26:47,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 23:26:47,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 23:26:47,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:47,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:47,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:47,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:47,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:47,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:47,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:47,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:26:47,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:47,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:47,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:47,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:47,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:47,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:47,728 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 23:26:47,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715150644] [2020-10-13 23:26:47,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:47,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:26:47,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115120708] [2020-10-13 23:26:47,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:26:47,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:47,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:26:47,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:26:47,734 INFO L87 Difference]: Start difference. First operand 102 states and 138 transitions. Second operand 5 states. [2020-10-13 23:26:47,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:47,950 INFO L93 Difference]: Finished difference Result 165 states and 227 transitions. [2020-10-13 23:26:47,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:26:47,951 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-10-13 23:26:47,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:47,957 INFO L225 Difference]: With dead ends: 165 [2020-10-13 23:26:47,957 INFO L226 Difference]: Without dead ends: 152 [2020-10-13 23:26:47,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:26:47,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-13 23:26:47,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 111. [2020-10-13 23:26:47,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-13 23:26:47,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 151 transitions. [2020-10-13 23:26:47,980 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 151 transitions. Word has length 37 [2020-10-13 23:26:47,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:47,981 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 151 transitions. [2020-10-13 23:26:47,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:26:47,982 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 151 transitions. [2020-10-13 23:26:47,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 23:26:47,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:47,984 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:47,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:26:47,985 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:47,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:47,985 INFO L82 PathProgramCache]: Analyzing trace with hash 681742301, now seen corresponding path program 1 times [2020-10-13 23:26:47,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:47,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108808319] [2020-10-13 23:26:47,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:48,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:48,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:48,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:48,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:48,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:48,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:48,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:48,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:48,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:48,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:48,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:48,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:48,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:50,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:50,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:53,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:53,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 23:26:53,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 23:26:53,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:26:53,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:53,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:53,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:26:53,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 23:26:53,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:26:53,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:53,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:53,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:53,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:53,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:53,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:53,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:53,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:26:53,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:53,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:53,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:53,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:53,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:53,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:53,069 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 23:26:53,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108808319] [2020-10-13 23:26:53,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:53,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:26:53,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790500435] [2020-10-13 23:26:53,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:26:53,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:53,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:26:53,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:26:53,073 INFO L87 Difference]: Start difference. First operand 111 states and 151 transitions. Second operand 6 states. [2020-10-13 23:26:53,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:53,313 INFO L93 Difference]: Finished difference Result 180 states and 247 transitions. [2020-10-13 23:26:53,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:26:53,314 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-10-13 23:26:53,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:53,316 INFO L225 Difference]: With dead ends: 180 [2020-10-13 23:26:53,317 INFO L226 Difference]: Without dead ends: 138 [2020-10-13 23:26:53,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:26:53,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-13 23:26:53,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 112. [2020-10-13 23:26:53,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 23:26:53,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 152 transitions. [2020-10-13 23:26:53,330 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 152 transitions. Word has length 39 [2020-10-13 23:26:53,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:53,331 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 152 transitions. [2020-10-13 23:26:53,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:26:53,331 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 152 transitions. [2020-10-13 23:26:53,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 23:26:53,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:53,333 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:53,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:26:53,334 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:53,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:53,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1836383471, now seen corresponding path program 1 times [2020-10-13 23:26:53,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:53,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169543431] [2020-10-13 23:26:53,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:53,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:53,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:53,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:53,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:53,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:55,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:55,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 23:26:55,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:26:55,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2490 [2020-10-13 23:26:55,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:55,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:55,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:26:55,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:26:55,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:26:55,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:55,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:55,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:55,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:55,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:55,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:55,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:55,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:26:55,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:55,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:55,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:55,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:55,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:55,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:55,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 23:26:55,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:55,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:55,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:55,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:26:55,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:55,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:26:55,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:55,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:55,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:55,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:26:55,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:55,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:55,884 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-13 23:26:55,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169543431] [2020-10-13 23:26:55,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:55,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:26:55,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243982420] [2020-10-13 23:26:55,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:26:55,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:55,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:26:55,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:26:55,887 INFO L87 Difference]: Start difference. First operand 112 states and 152 transitions. Second operand 6 states. [2020-10-13 23:26:55,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:55,990 INFO L93 Difference]: Finished difference Result 216 states and 296 transitions. [2020-10-13 23:26:55,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:26:55,991 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-10-13 23:26:55,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:55,993 INFO L225 Difference]: With dead ends: 216 [2020-10-13 23:26:55,993 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 23:26:55,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:26:55,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 23:26:56,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-10-13 23:26:56,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-13 23:26:56,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 154 transitions. [2020-10-13 23:26:56,003 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 154 transitions. Word has length 40 [2020-10-13 23:26:56,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:56,003 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 154 transitions. [2020-10-13 23:26:56,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:26:56,003 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 154 transitions. [2020-10-13 23:26:56,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 23:26:56,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:56,004 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:56,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:26:56,005 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:56,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:56,005 INFO L82 PathProgramCache]: Analyzing trace with hash -876276527, now seen corresponding path program 2 times [2020-10-13 23:26:56,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:56,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503970900] [2020-10-13 23:26:56,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:56,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:56,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:56,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:56,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:56,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:59,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:59,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 23:26:59,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:26:59,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3437 [2020-10-13 23:26:59,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:59,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:59,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:26:59,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:26:59,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:26:59,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:59,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:59,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:59,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:59,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:59,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:59,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:59,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:26:59,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:59,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:59,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:59,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:59,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:59,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:59,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-13 23:26:59,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:59,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:59,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:59,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:26:59,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:59,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:26:59,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:59,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:59,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:59,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:26:59,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:59,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:59,534 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-13 23:26:59,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503970900] [2020-10-13 23:26:59,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:59,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:26:59,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957338114] [2020-10-13 23:26:59,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:26:59,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:59,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:26:59,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:26:59,537 INFO L87 Difference]: Start difference. First operand 114 states and 154 transitions. Second operand 9 states. [2020-10-13 23:26:59,778 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-10-13 23:27:00,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:00,328 INFO L93 Difference]: Finished difference Result 448 states and 642 transitions. [2020-10-13 23:27:00,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:27:00,330 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-10-13 23:27:00,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:00,335 INFO L225 Difference]: With dead ends: 448 [2020-10-13 23:27:00,336 INFO L226 Difference]: Without dead ends: 367 [2020-10-13 23:27:00,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:27:00,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-10-13 23:27:00,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 137. [2020-10-13 23:27:00,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-13 23:27:00,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 190 transitions. [2020-10-13 23:27:00,367 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 190 transitions. Word has length 42 [2020-10-13 23:27:00,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:00,368 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 190 transitions. [2020-10-13 23:27:00,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:27:00,368 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 190 transitions. [2020-10-13 23:27:00,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 23:27:00,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:00,370 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:27:00,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:27:00,370 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:00,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:00,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1506541478, now seen corresponding path program 3 times [2020-10-13 23:27:00,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:00,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665944285] [2020-10-13 23:27:00,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:00,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:00,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:00,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:00,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:00,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:03,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:03,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 23:27:03,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:27:03,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3499 [2020-10-13 23:27:03,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:03,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:03,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:27:03,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 23:27:03,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 23:27:03,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:03,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:03,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:03,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:03,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:03,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:03,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:03,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:03,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:03,938 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:03,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:03,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:03,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:03,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:27:03,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-13 23:27:03,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:03,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:03,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:03,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:27:03,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:03,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:03,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:03,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:03,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:03,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:27:03,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:03,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:03,946 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-13 23:27:03,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665944285] [2020-10-13 23:27:03,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:27:03,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:27:03,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199573263] [2020-10-13 23:27:03,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:27:03,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:03,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:27:03,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:27:03,948 INFO L87 Difference]: Start difference. First operand 137 states and 190 transitions. Second operand 9 states. [2020-10-13 23:27:04,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:04,170 INFO L93 Difference]: Finished difference Result 245 states and 347 transitions. [2020-10-13 23:27:04,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:27:04,171 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2020-10-13 23:27:04,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:04,173 INFO L225 Difference]: With dead ends: 245 [2020-10-13 23:27:04,174 INFO L226 Difference]: Without dead ends: 147 [2020-10-13 23:27:04,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:27:04,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-13 23:27:04,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2020-10-13 23:27:04,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-13 23:27:04,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 198 transitions. [2020-10-13 23:27:04,186 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 198 transitions. Word has length 45 [2020-10-13 23:27:04,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:04,186 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 198 transitions. [2020-10-13 23:27:04,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:27:04,186 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 198 transitions. [2020-10-13 23:27:04,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 23:27:04,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:04,187 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:27:04,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:27:04,187 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:04,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:04,188 INFO L82 PathProgramCache]: Analyzing trace with hash -132678607, now seen corresponding path program 4 times [2020-10-13 23:27:04,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:04,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815319245] [2020-10-13 23:27:04,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:04,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:04,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:04,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:04,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:04,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:09,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:09,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 23:27:09,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:27:09,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:27:09,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:09,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:09,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:27:09,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:27:09,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:27:09,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:09,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:09,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:09,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:09,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:09,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:09,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:09,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:09,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:09,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:09,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:09,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:09,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:09,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:09,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 23:27:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:09,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:09,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:09,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:27:09,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:09,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:09,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:09,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:09,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:09,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:27:09,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:09,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:09,250 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-13 23:27:09,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815319245] [2020-10-13 23:27:09,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:27:09,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:27:09,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513159045] [2020-10-13 23:27:09,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:27:09,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:09,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:27:09,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:27:09,252 INFO L87 Difference]: Start difference. First operand 143 states and 198 transitions. Second operand 7 states. [2020-10-13 23:27:09,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:09,376 INFO L93 Difference]: Finished difference Result 276 states and 386 transitions. [2020-10-13 23:27:09,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:27:09,378 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 48 [2020-10-13 23:27:09,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:09,380 INFO L225 Difference]: With dead ends: 276 [2020-10-13 23:27:09,380 INFO L226 Difference]: Without dead ends: 146 [2020-10-13 23:27:09,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:27:09,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-13 23:27:09,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2020-10-13 23:27:09,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-13 23:27:09,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 200 transitions. [2020-10-13 23:27:09,392 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 200 transitions. Word has length 48 [2020-10-13 23:27:09,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:09,393 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 200 transitions. [2020-10-13 23:27:09,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:27:09,393 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 200 transitions. [2020-10-13 23:27:09,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 23:27:09,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:09,394 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:27:09,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:27:09,394 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:09,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:09,395 INFO L82 PathProgramCache]: Analyzing trace with hash 281711123, now seen corresponding path program 5 times [2020-10-13 23:27:09,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:09,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971535906] [2020-10-13 23:27:09,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:09,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:09,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:09,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:09,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:09,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:14,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:14,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 23:27:14,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:27:14,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:27:14,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:14,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:14,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:27:14,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 23:27:14,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:27:14,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:14,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:14,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:14,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:14,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:14,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:14,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:14,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:14,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:14,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:14,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:14,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:14,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:14,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:14,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-13 23:27:14,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:14,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:14,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:14,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:27:14,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:14,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:27:14,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:14,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:14,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:14,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:27:14,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:14,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:14,480 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 2 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-13 23:27:14,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971535906] [2020-10-13 23:27:14,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:27:14,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:27:14,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079436543] [2020-10-13 23:27:14,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:27:14,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:14,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:27:14,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:27:14,482 INFO L87 Difference]: Start difference. First operand 145 states and 200 transitions. Second operand 10 states. [2020-10-13 23:27:14,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:14,718 INFO L93 Difference]: Finished difference Result 253 states and 357 transitions. [2020-10-13 23:27:14,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:27:14,719 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2020-10-13 23:27:14,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:14,720 INFO L225 Difference]: With dead ends: 253 [2020-10-13 23:27:14,720 INFO L226 Difference]: Without dead ends: 155 [2020-10-13 23:27:14,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:27:14,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-13 23:27:14,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2020-10-13 23:27:14,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-13 23:27:14,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 208 transitions. [2020-10-13 23:27:14,733 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 208 transitions. Word has length 50 [2020-10-13 23:27:14,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:14,734 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 208 transitions. [2020-10-13 23:27:14,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:27:14,734 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 208 transitions. [2020-10-13 23:27:14,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 23:27:14,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:14,735 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:27:14,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:27:14,735 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:14,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:14,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1073781800, now seen corresponding path program 6 times [2020-10-13 23:27:14,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:14,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1757826835] [2020-10-13 23:27:14,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:14,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:14,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:14,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:14,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:15,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:19,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:19,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 23:27:19,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:27:19,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:27:19,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:19,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:19,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:27:19,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:27:19,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:27:19,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:19,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:19,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:19,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:19,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:19,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:19,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:19,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:19,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:19,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:19,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:19,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:19,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:19,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:19,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-13 23:27:19,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:19,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:19,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:19,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:27:19,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:19,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:19,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:19,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:19,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:19,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:27:19,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:19,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:19,798 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-10-13 23:27:19,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1757826835] [2020-10-13 23:27:19,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:27:19,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:27:19,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116171650] [2020-10-13 23:27:19,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:27:19,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:19,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:27:19,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:27:19,800 INFO L87 Difference]: Start difference. First operand 151 states and 208 transitions. Second operand 8 states. [2020-10-13 23:27:19,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:19,915 INFO L93 Difference]: Finished difference Result 290 states and 404 transitions. [2020-10-13 23:27:19,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:27:19,918 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-10-13 23:27:19,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:19,920 INFO L225 Difference]: With dead ends: 290 [2020-10-13 23:27:19,920 INFO L226 Difference]: Without dead ends: 154 [2020-10-13 23:27:19,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:27:19,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-13 23:27:19,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-10-13 23:27:19,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-13 23:27:19,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 210 transitions. [2020-10-13 23:27:19,932 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 210 transitions. Word has length 53 [2020-10-13 23:27:19,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:19,932 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 210 transitions. [2020-10-13 23:27:19,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:27:19,932 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 210 transitions. [2020-10-13 23:27:19,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 23:27:19,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:19,933 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:27:19,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:27:19,933 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:19,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:19,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1989716790, now seen corresponding path program 7 times [2020-10-13 23:27:19,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:19,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971537119] [2020-10-13 23:27:19,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:19,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:19,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:19,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:20,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:20,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:24,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:24,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 23:27:24,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:27:24,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:27:24,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:24,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:24,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:27:24,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 23:27:24,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 23:27:24,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:25,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:25,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:25,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:25,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:25,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:25,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:25,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:25,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:25,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:25,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:25,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:25,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:25,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-13 23:27:25,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:25,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:25,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:25,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:27:25,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:25,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:25,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:25,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:25,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:25,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:27:25,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:25,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:27:25,040 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-13 23:27:25,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971537119] [2020-10-13 23:27:25,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:27:25,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:27:25,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230904367] [2020-10-13 23:27:25,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:27:25,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:25,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:27:25,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:27:25,042 INFO L87 Difference]: Start difference. First operand 153 states and 210 transitions. Second operand 11 states. [2020-10-13 23:27:25,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:25,300 INFO L93 Difference]: Finished difference Result 261 states and 367 transitions. [2020-10-13 23:27:25,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:27:25,301 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-10-13 23:27:25,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:25,303 INFO L225 Difference]: With dead ends: 261 [2020-10-13 23:27:25,303 INFO L226 Difference]: Without dead ends: 163 [2020-10-13 23:27:25,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:27:25,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-13 23:27:25,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2020-10-13 23:27:25,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-13 23:27:25,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 218 transitions. [2020-10-13 23:27:25,315 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 218 transitions. Word has length 55 [2020-10-13 23:27:25,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:25,315 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 218 transitions. [2020-10-13 23:27:25,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:27:25,316 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 218 transitions. [2020-10-13 23:27:25,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 23:27:25,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:25,316 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:27:25,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:27:25,317 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:25,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:25,317 INFO L82 PathProgramCache]: Analyzing trace with hash -354511915, now seen corresponding path program 8 times [2020-10-13 23:27:25,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:25,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638287638] [2020-10-13 23:27:25,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:25,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:25,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:25,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:26,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:30,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:30,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 23:27:30,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:27:30,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:27:30,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:30,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:30,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:27:30,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:27:30,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:27:30,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:30,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:30,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:30,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:30,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:30,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:30,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:30,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:30,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:30,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:30,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:30,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:30,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:30,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:30,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 23:27:30,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:30,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:30,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:30,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:27:30,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:30,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:30,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:30,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:30,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:30,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:27:30,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:30,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:30,385 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-13 23:27:30,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638287638] [2020-10-13 23:27:30,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:27:30,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:27:30,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514642579] [2020-10-13 23:27:30,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:27:30,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:30,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:27:30,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:27:30,388 INFO L87 Difference]: Start difference. First operand 159 states and 218 transitions. Second operand 9 states. [2020-10-13 23:27:30,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:30,500 INFO L93 Difference]: Finished difference Result 304 states and 422 transitions. [2020-10-13 23:27:30,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:27:30,501 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-10-13 23:27:30,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:30,502 INFO L225 Difference]: With dead ends: 304 [2020-10-13 23:27:30,502 INFO L226 Difference]: Without dead ends: 162 [2020-10-13 23:27:30,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:27:30,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-13 23:27:30,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2020-10-13 23:27:30,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-13 23:27:30,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 220 transitions. [2020-10-13 23:27:30,517 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 220 transitions. Word has length 58 [2020-10-13 23:27:30,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:30,517 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 220 transitions. [2020-10-13 23:27:30,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:27:30,517 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 220 transitions. [2020-10-13 23:27:30,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 23:27:30,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:30,518 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:27:30,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:27:30,519 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:30,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:30,519 INFO L82 PathProgramCache]: Analyzing trace with hash 878786359, now seen corresponding path program 9 times [2020-10-13 23:27:30,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:30,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517533849] [2020-10-13 23:27:30,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:30,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:30,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:30,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:31,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:35,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:35,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 23:27:35,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:27:35,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:27:35,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:35,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:35,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:27:35,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 23:27:35,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:27:35,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:35,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:35,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:35,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:35,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:35,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:35,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:35,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:27:35,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:35,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:35,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:35,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:35,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:35,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:27:35,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-13 23:27:35,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:35,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:35,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:35,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:27:35,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:35,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:35,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:35,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:35,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:35,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:27:35,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:35,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:27:35,669 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-13 23:27:35,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517533849] [2020-10-13 23:27:35,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:27:35,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:27:35,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424377205] [2020-10-13 23:27:35,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:27:35,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:35,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:27:35,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:27:35,672 INFO L87 Difference]: Start difference. First operand 161 states and 220 transitions. Second operand 13 states. [2020-10-13 23:27:36,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:36,811 INFO L93 Difference]: Finished difference Result 739 states and 1072 transitions. [2020-10-13 23:27:36,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 23:27:36,811 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2020-10-13 23:27:36,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:36,816 INFO L225 Difference]: With dead ends: 739 [2020-10-13 23:27:36,816 INFO L226 Difference]: Without dead ends: 641 [2020-10-13 23:27:36,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:27:36,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2020-10-13 23:27:36,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 191. [2020-10-13 23:27:36,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-13 23:27:36,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 268 transitions. [2020-10-13 23:27:36,847 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 268 transitions. Word has length 60 [2020-10-13 23:27:36,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:36,848 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 268 transitions. [2020-10-13 23:27:36,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:27:36,848 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 268 transitions. [2020-10-13 23:27:36,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 23:27:36,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:36,854 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:27:36,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:27:36,856 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:36,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:36,856 INFO L82 PathProgramCache]: Analyzing trace with hash 935001140, now seen corresponding path program 10 times [2020-10-13 23:27:36,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:36,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053157888] [2020-10-13 23:27:36,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:36,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:36,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:36,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:37,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:38,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:41,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:41,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 23:27:41,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:27:41,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:27:41,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:41,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:41,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:27:41,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 23:27:41,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 23:27:41,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:41,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:41,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:41,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:41,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:41,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:41,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:41,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:41,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:41,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:41,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:41,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:41,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:27:41,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-13 23:27:41,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:41,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:41,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:41,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:27:41,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:41,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:41,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:41,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:41,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:41,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:27:41,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:41,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:41,996 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 2 proven. 92 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-13 23:27:41,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053157888] [2020-10-13 23:27:41,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:27:41,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:27:41,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660723224] [2020-10-13 23:27:41,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:27:41,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:41,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:27:41,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:27:41,999 INFO L87 Difference]: Start difference. First operand 191 states and 268 transitions. Second operand 13 states. [2020-10-13 23:27:42,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:42,280 INFO L93 Difference]: Finished difference Result 323 states and 465 transitions. [2020-10-13 23:27:42,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:27:42,284 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 63 [2020-10-13 23:27:42,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:42,285 INFO L225 Difference]: With dead ends: 323 [2020-10-13 23:27:42,285 INFO L226 Difference]: Without dead ends: 201 [2020-10-13 23:27:42,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:27:42,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-13 23:27:42,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 197. [2020-10-13 23:27:42,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-13 23:27:42,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 276 transitions. [2020-10-13 23:27:42,307 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 276 transitions. Word has length 63 [2020-10-13 23:27:42,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:42,308 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 276 transitions. [2020-10-13 23:27:42,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:27:42,308 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 276 transitions. [2020-10-13 23:27:42,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 23:27:42,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:42,309 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:27:42,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:27:42,309 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:42,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:42,310 INFO L82 PathProgramCache]: Analyzing trace with hash 592296471, now seen corresponding path program 11 times [2020-10-13 23:27:42,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:42,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216871954] [2020-10-13 23:27:42,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:42,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:42,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:42,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:42,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:44,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:47,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:47,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 23:27:47,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:27:47,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:27:47,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:47,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:47,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:27:47,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:27:47,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:27:47,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:47,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:47,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:47,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:47,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:47,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:47,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:47,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:47,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:47,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:47,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:47,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:47,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:47,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-13 23:27:47,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:47,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:47,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:47,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:27:47,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:47,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:27:47,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:47,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:47,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:47,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:27:47,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:47,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:47,394 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-10-13 23:27:47,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216871954] [2020-10-13 23:27:47,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:27:47,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:27:47,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499762295] [2020-10-13 23:27:47,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:27:47,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:47,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:27:47,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:27:47,395 INFO L87 Difference]: Start difference. First operand 197 states and 276 transitions. Second operand 10 states. [2020-10-13 23:27:47,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:47,529 INFO L93 Difference]: Finished difference Result 378 states and 536 transitions. [2020-10-13 23:27:47,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:27:47,531 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-10-13 23:27:47,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:47,532 INFO L225 Difference]: With dead ends: 378 [2020-10-13 23:27:47,532 INFO L226 Difference]: Without dead ends: 200 [2020-10-13 23:27:47,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:27:47,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-13 23:27:47,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2020-10-13 23:27:47,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-13 23:27:47,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 278 transitions. [2020-10-13 23:27:47,548 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 278 transitions. Word has length 66 [2020-10-13 23:27:47,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:47,548 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 278 transitions. [2020-10-13 23:27:47,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:27:47,549 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 278 transitions. [2020-10-13 23:27:47,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 23:27:47,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:47,550 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:27:47,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:27:47,550 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:47,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:47,551 INFO L82 PathProgramCache]: Analyzing trace with hash 531618681, now seen corresponding path program 12 times [2020-10-13 23:27:47,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:47,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804810188] [2020-10-13 23:27:47,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:47,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:47,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:47,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:47,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:49,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:52,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:52,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 23:27:52,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:27:52,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:27:52,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:52,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:52,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:27:52,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 23:27:52,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:27:52,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:52,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:52,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:52,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:52,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:52,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:52,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:52,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:52,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:52,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:52,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:52,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:52,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:52,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:52,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-13 23:27:52,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:52,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:52,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:52,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:27:52,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:52,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:52,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:52,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:52,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:52,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:27:52,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:52,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:52,691 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 2 proven. 117 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-13 23:27:52,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804810188] [2020-10-13 23:27:52,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:27:52,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:27:52,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859552914] [2020-10-13 23:27:52,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:27:52,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:52,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:27:52,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:27:52,693 INFO L87 Difference]: Start difference. First operand 199 states and 278 transitions. Second operand 14 states. [2020-10-13 23:27:53,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:53,037 INFO L93 Difference]: Finished difference Result 331 states and 475 transitions. [2020-10-13 23:27:53,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:27:53,038 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 68 [2020-10-13 23:27:53,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:53,041 INFO L225 Difference]: With dead ends: 331 [2020-10-13 23:27:53,041 INFO L226 Difference]: Without dead ends: 209 [2020-10-13 23:27:53,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:27:53,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-13 23:27:53,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 205. [2020-10-13 23:27:53,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-13 23:27:53,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 286 transitions. [2020-10-13 23:27:53,060 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 286 transitions. Word has length 68 [2020-10-13 23:27:53,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:53,061 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 286 transitions. [2020-10-13 23:27:53,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:27:53,061 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 286 transitions. [2020-10-13 23:27:53,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 23:27:53,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:53,062 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:27:53,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:27:53,063 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:53,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:53,063 INFO L82 PathProgramCache]: Analyzing trace with hash 743954610, now seen corresponding path program 13 times [2020-10-13 23:27:53,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:53,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822453956] [2020-10-13 23:27:53,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:53,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:53,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:53,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:53,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:55,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:58,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:58,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 23:27:58,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:27:58,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 23:27:58,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:58,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:58,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:27:58,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:27:58,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:27:58,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:58,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:27:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:58,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:58,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:58,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:27:58,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:58,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:27:58,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:58,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:58,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:58,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:27:58,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:58,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:58,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-13 23:27:58,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:58,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:58,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:27:58,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:27:58,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:27:58,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:27:58,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:27:58,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:27:58,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:27:58,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:27:58,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:27:58,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:27:58,162 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-13 23:27:58,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822453956] [2020-10-13 23:27:58,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:27:58,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:27:58,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191458604] [2020-10-13 23:27:58,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:27:58,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:27:58,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:27:58,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:27:58,163 INFO L87 Difference]: Start difference. First operand 205 states and 286 transitions. Second operand 11 states. [2020-10-13 23:27:58,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:27:58,314 INFO L93 Difference]: Finished difference Result 392 states and 554 transitions. [2020-10-13 23:27:58,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:27:58,315 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-10-13 23:27:58,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:27:58,316 INFO L225 Difference]: With dead ends: 392 [2020-10-13 23:27:58,316 INFO L226 Difference]: Without dead ends: 208 [2020-10-13 23:27:58,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:27:58,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-13 23:27:58,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2020-10-13 23:27:58,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-13 23:27:58,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 288 transitions. [2020-10-13 23:27:58,331 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 288 transitions. Word has length 71 [2020-10-13 23:27:58,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:27:58,331 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 288 transitions. [2020-10-13 23:27:58,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:27:58,332 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 288 transitions. [2020-10-13 23:27:58,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 23:27:58,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:27:58,335 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:27:58,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:27:58,336 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:27:58,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:27:58,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1805826928, now seen corresponding path program 14 times [2020-10-13 23:27:58,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:27:58,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360361370] [2020-10-13 23:27:58,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:27:58,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:27:58,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:58,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:27:58,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:01,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:03,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:03,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 23:28:03,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:28:03,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:28:03,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:03,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:03,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:28:03,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 23:28:03,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 23:28:03,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:03,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:28:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:03,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:03,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:03,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:28:03,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:03,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:03,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:03,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:03,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:03,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:03,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:03,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:03,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-13 23:28:03,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:03,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:03,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:03,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:28:03,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:03,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:28:03,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:03,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:03,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:03,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:28:03,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:03,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:03,509 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 2 proven. 145 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-13 23:28:03,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360361370] [2020-10-13 23:28:03,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:28:03,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:28:03,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584392990] [2020-10-13 23:28:03,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:28:03,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:28:03,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:28:03,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:28:03,510 INFO L87 Difference]: Start difference. First operand 207 states and 288 transitions. Second operand 16 states. [2020-10-13 23:28:05,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:28:05,076 INFO L93 Difference]: Finished difference Result 926 states and 1350 transitions. [2020-10-13 23:28:05,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 23:28:05,077 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-10-13 23:28:05,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:28:05,081 INFO L225 Difference]: With dead ends: 926 [2020-10-13 23:28:05,081 INFO L226 Difference]: Without dead ends: 804 [2020-10-13 23:28:05,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=484, Invalid=998, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 23:28:05,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2020-10-13 23:28:05,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 231. [2020-10-13 23:28:05,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-13 23:28:05,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 326 transitions. [2020-10-13 23:28:05,105 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 326 transitions. Word has length 73 [2020-10-13 23:28:05,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:28:05,105 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 326 transitions. [2020-10-13 23:28:05,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:28:05,105 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 326 transitions. [2020-10-13 23:28:05,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 23:28:05,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:28:05,106 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:28:05,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:28:05,106 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:28:05,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:28:05,107 INFO L82 PathProgramCache]: Analyzing trace with hash 206586939, now seen corresponding path program 15 times [2020-10-13 23:28:05,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:28:05,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104525426] [2020-10-13 23:28:05,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:28:05,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:05,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:05,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:05,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:08,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:10,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:10,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 23:28:10,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:28:10,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:28:10,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:10,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:10,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:28:10,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 23:28:10,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:28:10,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:10,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:28:10,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:10,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:10,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:10,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:28:10,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:10,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:10,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:10,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:10,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:10,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:10,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:10,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:10,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-13 23:28:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:10,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:10,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:10,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:28:10,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:10,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:28:10,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:10,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:10,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:10,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:28:10,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:10,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:10,268 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 2 proven. 176 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-13 23:28:10,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104525426] [2020-10-13 23:28:10,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:28:10,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:28:10,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574353448] [2020-10-13 23:28:10,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:28:10,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:28:10,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:28:10,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:28:10,270 INFO L87 Difference]: Start difference. First operand 231 states and 326 transitions. Second operand 16 states. [2020-10-13 23:28:10,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:28:10,717 INFO L93 Difference]: Finished difference Result 381 states and 553 transitions. [2020-10-13 23:28:10,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:28:10,718 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 76 [2020-10-13 23:28:10,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:28:10,720 INFO L225 Difference]: With dead ends: 381 [2020-10-13 23:28:10,721 INFO L226 Difference]: Without dead ends: 241 [2020-10-13 23:28:10,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:28:10,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-13 23:28:10,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 237. [2020-10-13 23:28:10,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-13 23:28:10,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 334 transitions. [2020-10-13 23:28:10,753 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 334 transitions. Word has length 76 [2020-10-13 23:28:10,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:28:10,753 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 334 transitions. [2020-10-13 23:28:10,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:28:10,754 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 334 transitions. [2020-10-13 23:28:10,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 23:28:10,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:28:10,755 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:28:10,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:28:10,756 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:28:10,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:28:10,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1420386128, now seen corresponding path program 16 times [2020-10-13 23:28:10,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:28:10,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120280728] [2020-10-13 23:28:10,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:28:10,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:10,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:10,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:11,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:15,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:15,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:15,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 23:28:15,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:28:15,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:28:15,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:15,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:15,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:28:15,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:28:15,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:28:15,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:15,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:28:15,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:15,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:15,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:15,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:28:15,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:15,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:15,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:15,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:15,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:15,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:15,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:15,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:28:15,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-13 23:28:15,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:15,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:15,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:15,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:28:15,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:15,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:28:15,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:15,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:15,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:15,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:28:15,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:15,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:28:15,870 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2020-10-13 23:28:15,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120280728] [2020-10-13 23:28:15,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:28:15,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:28:15,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603976454] [2020-10-13 23:28:15,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:28:15,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:28:15,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:28:15,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:28:15,883 INFO L87 Difference]: Start difference. First operand 237 states and 334 transitions. Second operand 12 states. [2020-10-13 23:28:16,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:28:16,030 INFO L93 Difference]: Finished difference Result 454 states and 648 transitions. [2020-10-13 23:28:16,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:28:16,032 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2020-10-13 23:28:16,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:28:16,034 INFO L225 Difference]: With dead ends: 454 [2020-10-13 23:28:16,034 INFO L226 Difference]: Without dead ends: 240 [2020-10-13 23:28:16,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:28:16,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-13 23:28:16,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2020-10-13 23:28:16,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-13 23:28:16,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 336 transitions. [2020-10-13 23:28:16,052 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 336 transitions. Word has length 79 [2020-10-13 23:28:16,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:28:16,053 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 336 transitions. [2020-10-13 23:28:16,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:28:16,053 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 336 transitions. [2020-10-13 23:28:16,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 23:28:16,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:28:16,054 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:28:16,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:28:16,054 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:28:16,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:28:16,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1813597838, now seen corresponding path program 17 times [2020-10-13 23:28:16,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:28:16,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707037060] [2020-10-13 23:28:16,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:28:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:16,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:16,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:16,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:20,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:21,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:21,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 23:28:21,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:28:21,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 23:28:21,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:21,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:21,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:28:21,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 23:28:21,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 23:28:21,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:21,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:28:21,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:21,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:21,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:21,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:28:21,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:21,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:21,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:21,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:21,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:21,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:21,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:21,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:21,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-13 23:28:21,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:21,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:21,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:21,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:28:21,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:21,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:21,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:21,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:21,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:21,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:28:21,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:21,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:21,227 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 2 proven. 210 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-10-13 23:28:21,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707037060] [2020-10-13 23:28:21,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:28:21,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:28:21,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368934357] [2020-10-13 23:28:21,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:28:21,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:28:21,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:28:21,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:28:21,229 INFO L87 Difference]: Start difference. First operand 239 states and 336 transitions. Second operand 17 states. [2020-10-13 23:28:21,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:28:21,641 INFO L93 Difference]: Finished difference Result 389 states and 563 transitions. [2020-10-13 23:28:21,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:28:21,642 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 81 [2020-10-13 23:28:21,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:28:21,645 INFO L225 Difference]: With dead ends: 389 [2020-10-13 23:28:21,645 INFO L226 Difference]: Without dead ends: 249 [2020-10-13 23:28:21,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:28:21,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-13 23:28:21,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 245. [2020-10-13 23:28:21,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-13 23:28:21,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 344 transitions. [2020-10-13 23:28:21,660 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 344 transitions. Word has length 81 [2020-10-13 23:28:21,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:28:21,660 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 344 transitions. [2020-10-13 23:28:21,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:28:21,660 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 344 transitions. [2020-10-13 23:28:21,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 23:28:21,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:28:21,662 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:28:21,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:28:21,662 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:28:21,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:28:21,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1335824765, now seen corresponding path program 18 times [2020-10-13 23:28:21,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:28:21,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115227685] [2020-10-13 23:28:21,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:28:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:21,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:21,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:21,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:26,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:26,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:26,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 23:28:26,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:28:26,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 23:28:26,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:26,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:26,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:28:26,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:28:26,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:28:26,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:26,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:28:26,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:26,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:26,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:26,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:28:26,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:26,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:26,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:26,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:26,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:26,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:26,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:26,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:26,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-13 23:28:26,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:26,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:26,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:26,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:28:26,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:26,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:28:26,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:26,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:26,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:26,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:28:26,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:26,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:26,778 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2020-10-13 23:28:26,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115227685] [2020-10-13 23:28:26,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:28:26,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:28:26,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662421051] [2020-10-13 23:28:26,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:28:26,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:28:26,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:28:26,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:28:26,780 INFO L87 Difference]: Start difference. First operand 245 states and 344 transitions. Second operand 13 states. [2020-10-13 23:28:26,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:28:26,907 INFO L93 Difference]: Finished difference Result 468 states and 666 transitions. [2020-10-13 23:28:26,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:28:26,907 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 84 [2020-10-13 23:28:26,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:28:26,909 INFO L225 Difference]: With dead ends: 468 [2020-10-13 23:28:26,910 INFO L226 Difference]: Without dead ends: 248 [2020-10-13 23:28:26,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:28:26,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-13 23:28:26,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2020-10-13 23:28:26,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-13 23:28:26,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 346 transitions. [2020-10-13 23:28:26,934 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 346 transitions. Word has length 84 [2020-10-13 23:28:26,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:28:26,934 INFO L479 AbstractCegarLoop]: Abstraction has 247 states and 346 transitions. [2020-10-13 23:28:26,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:28:26,935 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 346 transitions. [2020-10-13 23:28:26,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 23:28:26,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:28:26,937 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:28:26,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:28:26,937 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:28:26,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:28:26,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1767136863, now seen corresponding path program 19 times [2020-10-13 23:28:26,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:28:26,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388052289] [2020-10-13 23:28:26,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:28:26,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:26,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:26,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:27,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:31,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:31,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-13 23:28:31,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:28:31,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:28:31,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:31,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:31,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:28:31,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 23:28:31,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 23:28:31,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:32,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:28:32,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:32,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:32,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:32,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:28:32,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:32,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:32,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:32,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:32,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:32,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:32,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:32,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:32,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-13 23:28:32,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:32,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:32,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:32,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:28:32,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:32,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:28:32,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:32,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:32,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:32,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:28:32,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:32,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:32,136 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 2 proven. 247 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-10-13 23:28:32,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388052289] [2020-10-13 23:28:32,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:28:32,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:28:32,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966327808] [2020-10-13 23:28:32,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:28:32,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:28:32,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:28:32,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:28:32,138 INFO L87 Difference]: Start difference. First operand 247 states and 346 transitions. Second operand 18 states. [2020-10-13 23:28:32,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:28:32,582 INFO L93 Difference]: Finished difference Result 397 states and 573 transitions. [2020-10-13 23:28:32,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:28:32,583 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 86 [2020-10-13 23:28:32,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:28:32,584 INFO L225 Difference]: With dead ends: 397 [2020-10-13 23:28:32,585 INFO L226 Difference]: Without dead ends: 257 [2020-10-13 23:28:32,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:28:32,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-13 23:28:32,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 253. [2020-10-13 23:28:32,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-13 23:28:32,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 354 transitions. [2020-10-13 23:28:32,599 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 354 transitions. Word has length 86 [2020-10-13 23:28:32,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:28:32,600 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 354 transitions. [2020-10-13 23:28:32,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:28:32,600 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 354 transitions. [2020-10-13 23:28:32,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 23:28:32,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:28:32,601 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:28:32,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:28:32,601 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:28:32,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:28:32,602 INFO L82 PathProgramCache]: Analyzing trace with hash 196387852, now seen corresponding path program 20 times [2020-10-13 23:28:32,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:28:32,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661631161] [2020-10-13 23:28:32,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:28:32,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:32,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:32,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:32,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:37,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:37,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 23:28:37,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:28:37,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:28:37,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:37,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:37,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:28:37,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:28:37,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:28:37,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:37,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:28:37,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:37,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:37,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:37,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:28:37,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:37,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:37,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:37,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:37,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:37,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:37,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:37,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:37,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-13 23:28:37,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:37,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:37,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:37,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:28:37,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:37,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:37,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:37,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:37,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:37,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:28:37,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:37,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:37,726 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-13 23:28:37,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661631161] [2020-10-13 23:28:37,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:28:37,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:28:37,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568642317] [2020-10-13 23:28:37,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:28:37,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:28:37,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:28:37,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:28:37,728 INFO L87 Difference]: Start difference. First operand 253 states and 354 transitions. Second operand 14 states. [2020-10-13 23:28:37,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:28:37,864 INFO L93 Difference]: Finished difference Result 482 states and 684 transitions. [2020-10-13 23:28:37,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:28:37,865 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 89 [2020-10-13 23:28:37,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:28:37,866 INFO L225 Difference]: With dead ends: 482 [2020-10-13 23:28:37,867 INFO L226 Difference]: Without dead ends: 256 [2020-10-13 23:28:37,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:28:37,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-13 23:28:37,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 255. [2020-10-13 23:28:37,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-10-13 23:28:37,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 356 transitions. [2020-10-13 23:28:37,881 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 356 transitions. Word has length 89 [2020-10-13 23:28:37,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:28:37,882 INFO L479 AbstractCegarLoop]: Abstraction has 255 states and 356 transitions. [2020-10-13 23:28:37,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:28:37,882 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 356 transitions. [2020-10-13 23:28:37,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-13 23:28:37,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:28:37,883 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:28:37,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:28:37,883 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:28:37,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:28:37,884 INFO L82 PathProgramCache]: Analyzing trace with hash -317320086, now seen corresponding path program 21 times [2020-10-13 23:28:37,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:28:37,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518363989] [2020-10-13 23:28:37,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:28:37,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:37,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:37,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:38,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:42,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:42,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-13 23:28:42,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:28:42,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 23:28:42,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:42,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:42,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:28:42,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 23:28:42,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 23:28:42,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:43,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:28:43,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:43,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:43,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:43,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:28:43,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:43,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:43,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:43,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:43,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:43,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:43,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:43,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:43,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-13 23:28:43,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:43,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:43,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:43,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:28:43,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:43,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:28:43,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:43,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:43,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:43,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:28:43,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:43,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 2 proven. 287 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2020-10-13 23:28:43,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518363989] [2020-10-13 23:28:43,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:28:43,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:28:43,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610279118] [2020-10-13 23:28:43,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:28:43,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:28:43,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:28:43,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:28:43,121 INFO L87 Difference]: Start difference. First operand 255 states and 356 transitions. Second operand 20 states. [2020-10-13 23:28:45,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:28:45,357 INFO L93 Difference]: Finished difference Result 1218 states and 1782 transitions. [2020-10-13 23:28:45,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-13 23:28:45,358 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2020-10-13 23:28:45,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:28:45,364 INFO L225 Difference]: With dead ends: 1218 [2020-10-13 23:28:45,365 INFO L226 Difference]: Without dead ends: 1078 [2020-10-13 23:28:45,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=836, Invalid=1714, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 23:28:45,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2020-10-13 23:28:45,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 285. [2020-10-13 23:28:45,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-10-13 23:28:45,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 404 transitions. [2020-10-13 23:28:45,398 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 404 transitions. Word has length 91 [2020-10-13 23:28:45,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:28:45,399 INFO L479 AbstractCegarLoop]: Abstraction has 285 states and 404 transitions. [2020-10-13 23:28:45,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:28:45,399 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 404 transitions. [2020-10-13 23:28:45,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 23:28:45,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:28:45,401 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:28:45,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 23:28:45,401 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:28:45,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:28:45,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1223414239, now seen corresponding path program 22 times [2020-10-13 23:28:45,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:28:45,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969685596] [2020-10-13 23:28:45,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:28:45,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:45,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:45,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:46,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:50,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:50,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 23:28:50,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:28:50,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 23:28:50,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:50,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:50,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:28:50,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 23:28:50,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 23:28:50,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:50,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:28:50,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:50,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:50,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:50,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:28:50,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:50,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:50,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:50,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:50,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:50,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:50,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:50,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:50,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-13 23:28:50,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:50,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:50,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:50,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:28:50,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:50,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:28:50,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:50,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:50,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:50,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:28:50,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:50,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:50,644 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 2 proven. 330 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2020-10-13 23:28:50,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969685596] [2020-10-13 23:28:50,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:28:50,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:28:50,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605624973] [2020-10-13 23:28:50,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:28:50,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:28:50,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:28:50,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:28:50,646 INFO L87 Difference]: Start difference. First operand 285 states and 404 transitions. Second operand 20 states. [2020-10-13 23:28:51,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:28:51,196 INFO L93 Difference]: Finished difference Result 459 states and 671 transitions. [2020-10-13 23:28:51,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:28:51,201 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 94 [2020-10-13 23:28:51,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:28:51,203 INFO L225 Difference]: With dead ends: 459 [2020-10-13 23:28:51,204 INFO L226 Difference]: Without dead ends: 295 [2020-10-13 23:28:51,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 23:28:51,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-10-13 23:28:51,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 291. [2020-10-13 23:28:51,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-10-13 23:28:51,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 412 transitions. [2020-10-13 23:28:51,223 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 412 transitions. Word has length 94 [2020-10-13 23:28:51,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:28:51,224 INFO L479 AbstractCegarLoop]: Abstraction has 291 states and 412 transitions. [2020-10-13 23:28:51,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:28:51,224 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 412 transitions. [2020-10-13 23:28:51,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 23:28:51,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:28:51,225 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:28:51,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 23:28:51,225 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:28:51,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:28:51,226 INFO L82 PathProgramCache]: Analyzing trace with hash -804870902, now seen corresponding path program 23 times [2020-10-13 23:28:51,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:28:51,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477155058] [2020-10-13 23:28:51,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:28:51,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:51,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:51,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:51,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:56,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:56,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 23:28:56,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:28:56,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 23:28:56,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:56,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:56,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:28:56,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:28:56,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:28:56,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:56,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:28:56,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:56,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:56,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:56,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:28:56,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:56,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:28:56,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:56,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:56,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:56,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:28:56,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:56,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:56,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-10-13 23:28:56,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:56,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:56,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:28:56,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:28:56,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:28:56,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:28:56,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:28:56,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:28:56,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:28:56,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:28:56,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:28:56,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:28:56,368 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-10-13 23:28:56,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477155058] [2020-10-13 23:28:56,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:28:56,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:28:56,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099254570] [2020-10-13 23:28:56,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:28:56,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:28:56,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:28:56,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:28:56,370 INFO L87 Difference]: Start difference. First operand 291 states and 412 transitions. Second operand 15 states. [2020-10-13 23:28:56,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:28:56,532 INFO L93 Difference]: Finished difference Result 556 states and 798 transitions. [2020-10-13 23:28:56,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:28:56,533 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 97 [2020-10-13 23:28:56,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:28:56,535 INFO L225 Difference]: With dead ends: 556 [2020-10-13 23:28:56,535 INFO L226 Difference]: Without dead ends: 294 [2020-10-13 23:28:56,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:28:56,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-13 23:28:56,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 293. [2020-10-13 23:28:56,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-10-13 23:28:56,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 414 transitions. [2020-10-13 23:28:56,552 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 414 transitions. Word has length 97 [2020-10-13 23:28:56,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:28:56,552 INFO L479 AbstractCegarLoop]: Abstraction has 293 states and 414 transitions. [2020-10-13 23:28:56,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:28:56,552 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 414 transitions. [2020-10-13 23:28:56,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 23:28:56,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:28:56,554 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:28:56,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 23:28:56,554 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:28:56,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:28:56,554 INFO L82 PathProgramCache]: Analyzing trace with hash 572053352, now seen corresponding path program 24 times [2020-10-13 23:28:56,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:28:56,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808705281] [2020-10-13 23:28:56,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:28:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:28:56,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:56,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:28:57,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:01,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:01,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 23:29:01,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:29:01,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:29:01,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:01,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:01,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:29:01,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 23:29:01,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 23:29:01,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:01,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:29:01,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:01,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:01,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:01,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:29:01,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:01,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:01,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:01,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:01,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:01,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:29:01,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:01,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:01,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-13 23:29:01,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:01,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:01,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:01,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:01,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:01,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:29:01,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:01,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:01,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:01,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:01,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:01,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:01,830 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 2 proven. 376 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-10-13 23:29:01,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808705281] [2020-10-13 23:29:01,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:29:01,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:29:01,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348187127] [2020-10-13 23:29:01,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:29:01,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:29:01,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:29:01,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:29:01,832 INFO L87 Difference]: Start difference. First operand 293 states and 414 transitions. Second operand 21 states. [2020-10-13 23:29:02,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:29:02,405 INFO L93 Difference]: Finished difference Result 467 states and 681 transitions. [2020-10-13 23:29:02,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:29:02,405 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 99 [2020-10-13 23:29:02,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:29:02,407 INFO L225 Difference]: With dead ends: 467 [2020-10-13 23:29:02,407 INFO L226 Difference]: Without dead ends: 303 [2020-10-13 23:29:02,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:29:02,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-13 23:29:02,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 299. [2020-10-13 23:29:02,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-10-13 23:29:02,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 422 transitions. [2020-10-13 23:29:02,422 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 422 transitions. Word has length 99 [2020-10-13 23:29:02,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:29:02,422 INFO L479 AbstractCegarLoop]: Abstraction has 299 states and 422 transitions. [2020-10-13 23:29:02,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:29:02,422 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 422 transitions. [2020-10-13 23:29:02,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 23:29:02,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:29:02,423 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:29:02,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 23:29:02,424 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:29:02,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:29:02,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1552571805, now seen corresponding path program 25 times [2020-10-13 23:29:02,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:29:02,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297151255] [2020-10-13 23:29:02,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:29:02,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:02,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:02,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:03,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:07,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:07,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 23:29:07,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:29:07,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:29:07,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:07,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:07,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:29:07,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:29:07,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:29:07,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:07,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:29:07,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:07,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:07,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:07,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:29:07,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:07,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:07,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:07,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:07,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:07,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:29:07,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:07,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:07,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-10-13 23:29:07,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:07,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:07,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:07,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:07,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:07,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:29:07,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:07,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:07,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:07,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:07,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:07,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:07,588 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 2 proven. 144 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2020-10-13 23:29:07,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297151255] [2020-10-13 23:29:07,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:29:07,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:29:07,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794096184] [2020-10-13 23:29:07,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:29:07,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:29:07,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:29:07,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:29:07,590 INFO L87 Difference]: Start difference. First operand 299 states and 422 transitions. Second operand 16 states. [2020-10-13 23:29:07,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:29:07,737 INFO L93 Difference]: Finished difference Result 570 states and 816 transitions. [2020-10-13 23:29:07,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:29:07,737 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 102 [2020-10-13 23:29:07,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:29:07,739 INFO L225 Difference]: With dead ends: 570 [2020-10-13 23:29:07,739 INFO L226 Difference]: Without dead ends: 302 [2020-10-13 23:29:07,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:29:07,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2020-10-13 23:29:07,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 301. [2020-10-13 23:29:07,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-10-13 23:29:07,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 424 transitions. [2020-10-13 23:29:07,755 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 424 transitions. Word has length 102 [2020-10-13 23:29:07,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:29:07,756 INFO L479 AbstractCegarLoop]: Abstraction has 301 states and 424 transitions. [2020-10-13 23:29:07,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:29:07,756 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 424 transitions. [2020-10-13 23:29:07,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 23:29:07,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:29:07,757 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:29:07,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 23:29:07,757 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:29:07,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:29:07,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1084605755, now seen corresponding path program 26 times [2020-10-13 23:29:07,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:29:07,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237228103] [2020-10-13 23:29:07,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:29:07,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:07,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:07,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:08,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:12,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:12,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 23:29:12,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:29:12,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:29:12,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:12,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:12,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:29:12,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-13 23:29:12,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 23:29:12,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:13,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:29:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:13,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:13,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:13,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:29:13,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:13,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:13,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:13,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:13,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:13,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:29:13,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:13,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:13,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-10-13 23:29:13,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:13,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:13,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:13,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:13,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:13,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:29:13,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:13,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:13,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:13,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:13,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:13,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:13,090 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 2 proven. 425 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-10-13 23:29:13,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237228103] [2020-10-13 23:29:13,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:29:13,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:29:13,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242773860] [2020-10-13 23:29:13,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:29:13,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:29:13,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:29:13,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:29:13,092 INFO L87 Difference]: Start difference. First operand 301 states and 424 transitions. Second operand 23 states. [2020-10-13 23:29:15,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:29:15,898 INFO L93 Difference]: Finished difference Result 1405 states and 2060 transitions. [2020-10-13 23:29:15,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-13 23:29:15,899 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 104 [2020-10-13 23:29:15,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:29:15,907 INFO L225 Difference]: With dead ends: 1405 [2020-10-13 23:29:15,908 INFO L226 Difference]: Without dead ends: 1241 [2020-10-13 23:29:15,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1163, Invalid=2377, Unknown=0, NotChecked=0, Total=3540 [2020-10-13 23:29:15,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2020-10-13 23:29:15,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 325. [2020-10-13 23:29:15,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-13 23:29:15,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 462 transitions. [2020-10-13 23:29:15,949 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 462 transitions. Word has length 104 [2020-10-13 23:29:15,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:29:15,950 INFO L479 AbstractCegarLoop]: Abstraction has 325 states and 462 transitions. [2020-10-13 23:29:15,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:29:15,950 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 462 transitions. [2020-10-13 23:29:15,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 23:29:15,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:29:15,952 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:29:15,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 23:29:15,952 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:29:15,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:29:15,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1614830106, now seen corresponding path program 27 times [2020-10-13 23:29:15,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:29:15,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27577497] [2020-10-13 23:29:15,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:29:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:15,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:15,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:17,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:20,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:20,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 23:29:20,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:29:20,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-13 23:29:20,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:21,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:21,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:29:21,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 23:29:21,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 23:29:21,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:21,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:29:21,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:21,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:21,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:21,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:29:21,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:21,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:21,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:21,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:21,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:21,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:29:21,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:21,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:21,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-13 23:29:21,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:21,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:21,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:21,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:21,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:21,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:21,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:21,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:21,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:21,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:21,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:21,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:21,289 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 2 proven. 477 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-10-13 23:29:21,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27577497] [2020-10-13 23:29:21,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:29:21,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:29:21,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363794393] [2020-10-13 23:29:21,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:29:21,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:29:21,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:29:21,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:29:21,290 INFO L87 Difference]: Start difference. First operand 325 states and 462 transitions. Second operand 23 states. [2020-10-13 23:29:21,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:29:21,787 INFO L93 Difference]: Finished difference Result 517 states and 759 transitions. [2020-10-13 23:29:21,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:29:21,788 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 107 [2020-10-13 23:29:21,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:29:21,790 INFO L225 Difference]: With dead ends: 517 [2020-10-13 23:29:21,790 INFO L226 Difference]: Without dead ends: 335 [2020-10-13 23:29:21,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 23:29:21,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-13 23:29:21,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 331. [2020-10-13 23:29:21,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-10-13 23:29:21,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 470 transitions. [2020-10-13 23:29:21,810 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 470 transitions. Word has length 107 [2020-10-13 23:29:21,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:29:21,811 INFO L479 AbstractCegarLoop]: Abstraction has 331 states and 470 transitions. [2020-10-13 23:29:21,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:29:21,811 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 470 transitions. [2020-10-13 23:29:21,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 23:29:21,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:29:21,812 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:29:21,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 23:29:21,813 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:29:21,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:29:21,813 INFO L82 PathProgramCache]: Analyzing trace with hash -638756059, now seen corresponding path program 28 times [2020-10-13 23:29:21,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:29:21,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573389340] [2020-10-13 23:29:21,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:29:21,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:21,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:21,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:23,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:26,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:26,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-13 23:29:26,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:29:26,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 23:29:26,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:26,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:26,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:29:26,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:29:26,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:29:26,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:26,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:29:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:26,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:26,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:26,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:29:26,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:26,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:26,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:26,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:26,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:26,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:29:26,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:26,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:26,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-10-13 23:29:26,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:26,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:26,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:26,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:26,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:26,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:29:26,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:26,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:26,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:26,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:26,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:26,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:26,991 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 2 proven. 169 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2020-10-13 23:29:26,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573389340] [2020-10-13 23:29:26,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:29:26,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:29:26,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735717376] [2020-10-13 23:29:26,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:29:26,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:29:26,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:29:26,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:29:26,993 INFO L87 Difference]: Start difference. First operand 331 states and 470 transitions. Second operand 17 states. [2020-10-13 23:29:27,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:29:27,170 INFO L93 Difference]: Finished difference Result 632 states and 910 transitions. [2020-10-13 23:29:27,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:29:27,170 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 110 [2020-10-13 23:29:27,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:29:27,172 INFO L225 Difference]: With dead ends: 632 [2020-10-13 23:29:27,172 INFO L226 Difference]: Without dead ends: 334 [2020-10-13 23:29:27,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:29:27,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-13 23:29:27,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 333. [2020-10-13 23:29:27,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-10-13 23:29:27,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 472 transitions. [2020-10-13 23:29:27,189 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 472 transitions. Word has length 110 [2020-10-13 23:29:27,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:29:27,190 INFO L479 AbstractCegarLoop]: Abstraction has 333 states and 472 transitions. [2020-10-13 23:29:27,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:29:27,190 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 472 transitions. [2020-10-13 23:29:27,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-13 23:29:27,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:29:27,191 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:29:27,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 23:29:27,192 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:29:27,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:29:27,192 INFO L82 PathProgramCache]: Analyzing trace with hash 904688007, now seen corresponding path program 29 times [2020-10-13 23:29:27,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:29:27,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698214930] [2020-10-13 23:29:27,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:29:27,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:27,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:27,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:28,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:32,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:32,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-13 23:29:32,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:29:32,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:29:32,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:32,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:32,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:29:32,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 23:29:32,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 23:29:32,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:32,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:29:32,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:32,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:32,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:32,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:29:32,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:32,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:32,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:32,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:32,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:32,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:29:32,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:32,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:32,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-10-13 23:29:32,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:32,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:32,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:32,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:32,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:32,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:29:32,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:32,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:32,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:32,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:32,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:32,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:32,522 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 2 proven. 532 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-10-13 23:29:32,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698214930] [2020-10-13 23:29:32,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:29:32,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:29:32,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126520664] [2020-10-13 23:29:32,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:29:32,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:29:32,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:29:32,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:29:32,523 INFO L87 Difference]: Start difference. First operand 333 states and 472 transitions. Second operand 24 states. [2020-10-13 23:29:33,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:29:33,238 INFO L93 Difference]: Finished difference Result 525 states and 769 transitions. [2020-10-13 23:29:33,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:29:33,239 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 112 [2020-10-13 23:29:33,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:29:33,241 INFO L225 Difference]: With dead ends: 525 [2020-10-13 23:29:33,241 INFO L226 Difference]: Without dead ends: 343 [2020-10-13 23:29:33,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 23:29:33,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-10-13 23:29:33,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 339. [2020-10-13 23:29:33,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-10-13 23:29:33,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 480 transitions. [2020-10-13 23:29:33,260 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 480 transitions. Word has length 112 [2020-10-13 23:29:33,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:29:33,260 INFO L479 AbstractCegarLoop]: Abstraction has 339 states and 480 transitions. [2020-10-13 23:29:33,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:29:33,261 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 480 transitions. [2020-10-13 23:29:33,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-13 23:29:33,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:29:33,262 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:29:33,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 23:29:33,262 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:29:33,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:29:33,262 INFO L82 PathProgramCache]: Analyzing trace with hash -523116572, now seen corresponding path program 30 times [2020-10-13 23:29:33,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:29:33,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924703982] [2020-10-13 23:29:33,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:29:33,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:33,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:33,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:34,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:38,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:38,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-13 23:29:38,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:29:38,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-13 23:29:38,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:38,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:38,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:29:38,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:29:38,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:29:38,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:38,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:29:38,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:38,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:38,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:38,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:29:38,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:38,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:38,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:38,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:38,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:38,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:29:38,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:38,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:38,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-13 23:29:38,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:38,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:38,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:38,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:38,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:38,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:29:38,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:38,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:38,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:38,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:38,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:38,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:38,494 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2020-10-13 23:29:38,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924703982] [2020-10-13 23:29:38,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:29:38,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:29:38,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143068952] [2020-10-13 23:29:38,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:29:38,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:29:38,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:29:38,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:29:38,495 INFO L87 Difference]: Start difference. First operand 339 states and 480 transitions. Second operand 18 states. [2020-10-13 23:29:38,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:29:38,629 INFO L93 Difference]: Finished difference Result 646 states and 928 transitions. [2020-10-13 23:29:38,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:29:38,629 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 115 [2020-10-13 23:29:38,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:29:38,631 INFO L225 Difference]: With dead ends: 646 [2020-10-13 23:29:38,631 INFO L226 Difference]: Without dead ends: 342 [2020-10-13 23:29:38,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:29:38,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-10-13 23:29:38,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 341. [2020-10-13 23:29:38,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-10-13 23:29:38,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 482 transitions. [2020-10-13 23:29:38,648 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 482 transitions. Word has length 115 [2020-10-13 23:29:38,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:29:38,649 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 482 transitions. [2020-10-13 23:29:38,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:29:38,649 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 482 transitions. [2020-10-13 23:29:38,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-13 23:29:38,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:29:38,650 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:29:38,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 23:29:38,650 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:29:38,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:29:38,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1577809602, now seen corresponding path program 31 times [2020-10-13 23:29:38,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:29:38,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689319923] [2020-10-13 23:29:38,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:29:38,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:38,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:38,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:40,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:43,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:43,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-13 23:29:43,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:29:43,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 23:29:43,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:43,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:43,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:29:43,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 23:29:43,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 23:29:43,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:43,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:29:43,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:43,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:43,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:43,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:29:43,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:43,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:43,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:43,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:43,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:43,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:29:43,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:43,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:29:43,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-10-13 23:29:43,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:43,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:43,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:43,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:43,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:43,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:29:43,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:43,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:43,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:43,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:43,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:43,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:44,001 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 2 proven. 590 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2020-10-13 23:29:44,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689319923] [2020-10-13 23:29:44,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:29:44,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:29:44,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996069085] [2020-10-13 23:29:44,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:29:44,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:29:44,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:29:44,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:29:44,003 INFO L87 Difference]: Start difference. First operand 341 states and 482 transitions. Second operand 25 states. [2020-10-13 23:29:44,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:29:44,674 INFO L93 Difference]: Finished difference Result 533 states and 779 transitions. [2020-10-13 23:29:44,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:29:44,675 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 117 [2020-10-13 23:29:44,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:29:44,676 INFO L225 Difference]: With dead ends: 533 [2020-10-13 23:29:44,676 INFO L226 Difference]: Without dead ends: 351 [2020-10-13 23:29:44,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=761, Invalid=1309, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 23:29:44,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-10-13 23:29:44,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 347. [2020-10-13 23:29:44,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2020-10-13 23:29:44,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 490 transitions. [2020-10-13 23:29:44,695 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 490 transitions. Word has length 117 [2020-10-13 23:29:44,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:29:44,695 INFO L479 AbstractCegarLoop]: Abstraction has 347 states and 490 transitions. [2020-10-13 23:29:44,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:29:44,696 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 490 transitions. [2020-10-13 23:29:44,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-13 23:29:44,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:29:44,697 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:29:44,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 23:29:44,697 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:29:44,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:29:44,698 INFO L82 PathProgramCache]: Analyzing trace with hash -759984951, now seen corresponding path program 32 times [2020-10-13 23:29:44,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:29:44,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812956778] [2020-10-13 23:29:44,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:29:44,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:44,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:44,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:46,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:49,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:49,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 23:29:49,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:29:49,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-13 23:29:49,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:49,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:49,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:29:49,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:29:49,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:29:49,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:49,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:29:49,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:49,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:49,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:49,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:29:49,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:49,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:29:49,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:49,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:49,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:49,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:29:49,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:49,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:49,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-13 23:29:49,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:49,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:49,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:49,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:49,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:49,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:49,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:49,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:49,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:49,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:49,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:49,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:49,920 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 2 proven. 225 refuted. 0 times theorem prover too weak. 653 trivial. 0 not checked. [2020-10-13 23:29:49,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812956778] [2020-10-13 23:29:49,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:29:49,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:29:49,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679882361] [2020-10-13 23:29:49,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:29:49,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:29:49,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:29:49,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:29:49,922 INFO L87 Difference]: Start difference. First operand 347 states and 490 transitions. Second operand 19 states. [2020-10-13 23:29:50,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:29:50,107 INFO L93 Difference]: Finished difference Result 660 states and 946 transitions. [2020-10-13 23:29:50,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:29:50,108 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 120 [2020-10-13 23:29:50,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:29:50,110 INFO L225 Difference]: With dead ends: 660 [2020-10-13 23:29:50,110 INFO L226 Difference]: Without dead ends: 350 [2020-10-13 23:29:50,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:29:50,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-10-13 23:29:50,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 349. [2020-10-13 23:29:50,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-10-13 23:29:50,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 492 transitions. [2020-10-13 23:29:50,129 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 492 transitions. Word has length 120 [2020-10-13 23:29:50,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:29:50,130 INFO L479 AbstractCegarLoop]: Abstraction has 349 states and 492 transitions. [2020-10-13 23:29:50,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:29:50,130 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 492 transitions. [2020-10-13 23:29:50,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-13 23:29:50,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:29:50,131 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:29:50,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 23:29:50,131 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:29:50,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:29:50,132 INFO L82 PathProgramCache]: Analyzing trace with hash 584814763, now seen corresponding path program 33 times [2020-10-13 23:29:50,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:29:50,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714587607] [2020-10-13 23:29:50,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:29:50,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:50,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:50,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:52,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:55,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:55,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-13 23:29:55,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:29:55,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:29:55,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:55,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:55,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:29:55,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-13 23:29:55,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 23:29:55,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:55,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:29:55,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:55,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:55,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:55,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:29:55,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:55,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:29:55,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:55,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:55,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:55,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:29:55,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:55,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:55,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-10-13 23:29:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:55,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:55,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:29:55,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:29:55,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:29:55,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:29:55,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:29:55,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:29:55,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:29:55,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:29:55,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:29:55,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:29:55,547 INFO L134 CoverageAnalysis]: Checked inductivity of 911 backedges. 2 proven. 651 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2020-10-13 23:29:55,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714587607] [2020-10-13 23:29:55,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:29:55,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 23:29:55,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366173137] [2020-10-13 23:29:55,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 23:29:55,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:29:55,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 23:29:55,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:29:55,549 INFO L87 Difference]: Start difference. First operand 349 states and 492 transitions. Second operand 27 states. [2020-10-13 23:29:59,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:29:59,346 INFO L93 Difference]: Finished difference Result 1697 states and 2492 transitions. [2020-10-13 23:29:59,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-13 23:29:59,347 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 122 [2020-10-13 23:29:59,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:29:59,352 INFO L225 Difference]: With dead ends: 1697 [2020-10-13 23:29:59,353 INFO L226 Difference]: Without dead ends: 1515 [2020-10-13 23:29:59,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1683, Invalid=3429, Unknown=0, NotChecked=0, Total=5112 [2020-10-13 23:29:59,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2020-10-13 23:29:59,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 379. [2020-10-13 23:29:59,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-10-13 23:29:59,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 540 transitions. [2020-10-13 23:29:59,391 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 540 transitions. Word has length 122 [2020-10-13 23:29:59,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:29:59,391 INFO L479 AbstractCegarLoop]: Abstraction has 379 states and 540 transitions. [2020-10-13 23:29:59,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 23:29:59,391 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 540 transitions. [2020-10-13 23:29:59,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-13 23:29:59,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:29:59,392 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:29:59,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 23:29:59,393 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:29:59,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:29:59,393 INFO L82 PathProgramCache]: Analyzing trace with hash 665501248, now seen corresponding path program 34 times [2020-10-13 23:29:59,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:29:59,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338829418] [2020-10-13 23:29:59,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:29:59,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:29:59,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:29:59,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:00,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:04,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:04,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-13 23:30:04,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:30:04,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-13 23:30:04,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:04,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:04,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:30:04,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 23:30:04,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-13 23:30:04,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:04,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:04,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:04,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:04,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:04,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:04,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:30:04,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:04,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:04,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:04,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:04,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:04,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:04,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-10-13 23:30:04,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:04,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:04,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:04,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:30:04,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:04,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:30:04,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:04,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:04,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:04,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:30:04,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:04,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 2 proven. 715 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2020-10-13 23:30:04,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338829418] [2020-10-13 23:30:04,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:30:04,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 23:30:04,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248629677] [2020-10-13 23:30:04,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 23:30:04,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:04,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 23:30:04,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:30:04,965 INFO L87 Difference]: Start difference. First operand 379 states and 540 transitions. Second operand 27 states. [2020-10-13 23:30:05,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:05,640 INFO L93 Difference]: Finished difference Result 595 states and 877 transitions. [2020-10-13 23:30:05,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 23:30:05,641 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 125 [2020-10-13 23:30:05,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:05,643 INFO L225 Difference]: With dead ends: 595 [2020-10-13 23:30:05,643 INFO L226 Difference]: Without dead ends: 389 [2020-10-13 23:30:05,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=902, Invalid=1548, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 23:30:05,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-10-13 23:30:05,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 385. [2020-10-13 23:30:05,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-10-13 23:30:05,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 548 transitions. [2020-10-13 23:30:05,666 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 548 transitions. Word has length 125 [2020-10-13 23:30:05,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:05,666 INFO L479 AbstractCegarLoop]: Abstraction has 385 states and 548 transitions. [2020-10-13 23:30:05,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 23:30:05,666 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 548 transitions. [2020-10-13 23:30:05,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-13 23:30:05,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:05,667 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:05,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 23:30:05,668 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:05,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:05,668 INFO L82 PathProgramCache]: Analyzing trace with hash -785109877, now seen corresponding path program 35 times [2020-10-13 23:30:05,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:05,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212663114] [2020-10-13 23:30:05,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:05,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:05,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:07,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:10,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:10,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-13 23:30:10,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:30:10,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 23:30:10,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:10,702 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:10,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:30:10,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:30:10,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:30:10,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:10,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:10,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:10,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:10,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:10,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:10,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:10,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:30:10,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:10,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:10,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:10,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:10,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:10,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 23:30:10,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-10-13 23:30:10,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:10,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:10,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:10,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:30:10,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:10,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:30:10,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:10,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:10,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:10,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:30:10,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:10,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:10,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 2 proven. 256 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-10-13 23:30:10,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212663114] [2020-10-13 23:30:10,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:30:10,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:30:10,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241498540] [2020-10-13 23:30:10,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:30:10,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:10,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:30:10,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:30:10,994 INFO L87 Difference]: Start difference. First operand 385 states and 548 transitions. Second operand 20 states. [2020-10-13 23:30:11,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:11,166 INFO L93 Difference]: Finished difference Result 734 states and 1060 transitions. [2020-10-13 23:30:11,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:30:11,167 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 128 [2020-10-13 23:30:11,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:11,168 INFO L225 Difference]: With dead ends: 734 [2020-10-13 23:30:11,169 INFO L226 Difference]: Without dead ends: 388 [2020-10-13 23:30:11,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:30:11,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2020-10-13 23:30:11,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 387. [2020-10-13 23:30:11,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2020-10-13 23:30:11,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 550 transitions. [2020-10-13 23:30:11,192 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 550 transitions. Word has length 128 [2020-10-13 23:30:11,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:11,193 INFO L479 AbstractCegarLoop]: Abstraction has 387 states and 550 transitions. [2020-10-13 23:30:11,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:30:11,193 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 550 transitions. [2020-10-13 23:30:11,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-13 23:30:11,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:11,194 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:11,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 23:30:11,194 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:11,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:11,195 INFO L82 PathProgramCache]: Analyzing trace with hash 722677357, now seen corresponding path program 36 times [2020-10-13 23:30:11,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:11,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507349230] [2020-10-13 23:30:11,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:11,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:11,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:11,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:13,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:16,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:16,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-13 23:30:16,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:30:16,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-13 23:30:16,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:16,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:16,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 23:30:16,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 23:30:16,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 23:30:16,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:16,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:16,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:16,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:16,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:16,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:16,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:30:16,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:16,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:16,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:16,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:16,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:16,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:16,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-10-13 23:30:16,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:16,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:16,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:16,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:30:16,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:16,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:30:16,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:16,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:16,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:16,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:30:16,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:16,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:16,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1075 backedges. 2 proven. 782 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2020-10-13 23:30:16,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507349230] [2020-10-13 23:30:16,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:30:16,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 23:30:16,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683080283] [2020-10-13 23:30:16,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 23:30:16,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:16,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 23:30:16,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:30:16,696 INFO L87 Difference]: Start difference. First operand 387 states and 550 transitions. Second operand 28 states. [2020-10-13 23:30:17,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:17,573 INFO L93 Difference]: Finished difference Result 603 states and 887 transitions. [2020-10-13 23:30:17,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:30:17,573 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 130 [2020-10-13 23:30:17,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:17,575 INFO L225 Difference]: With dead ends: 603 [2020-10-13 23:30:17,575 INFO L226 Difference]: Without dead ends: 397 [2020-10-13 23:30:17,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=977, Invalid=1675, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 23:30:17,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-10-13 23:30:17,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 393. [2020-10-13 23:30:17,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2020-10-13 23:30:17,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 558 transitions. [2020-10-13 23:30:17,597 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 558 transitions. Word has length 130 [2020-10-13 23:30:17,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:17,597 INFO L479 AbstractCegarLoop]: Abstraction has 393 states and 558 transitions. [2020-10-13 23:30:17,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 23:30:17,597 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 558 transitions. [2020-10-13 23:30:17,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-13 23:30:17,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:17,598 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:17,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 23:30:17,598 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:17,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:17,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1741304126, now seen corresponding path program 37 times [2020-10-13 23:30:17,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:17,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35644031] [2020-10-13 23:30:17,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:17,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:17,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:19,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:22,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:22,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-13 23:30:22,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:30:22,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-13 23:30:22,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:22,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:22,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:30:22,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:30:22,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:30:22,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:22,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:22,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:22,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:22,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:22,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:22,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:22,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:30:22,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:22,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:22,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:22,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:22,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:22,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:22,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-10-13 23:30:22,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:22,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:22,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:22,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:30:22,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:22,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:30:22,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:22,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:22,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:22,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:30:22,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:22,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:22,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1145 backedges. 2 proven. 289 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2020-10-13 23:30:22,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35644031] [2020-10-13 23:30:22,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:30:22,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:30:22,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702015524] [2020-10-13 23:30:22,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:30:22,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:22,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:30:22,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:30:22,895 INFO L87 Difference]: Start difference. First operand 393 states and 558 transitions. Second operand 21 states. [2020-10-13 23:30:23,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:23,098 INFO L93 Difference]: Finished difference Result 748 states and 1078 transitions. [2020-10-13 23:30:23,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:30:23,098 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 133 [2020-10-13 23:30:23,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:23,100 INFO L225 Difference]: With dead ends: 748 [2020-10-13 23:30:23,100 INFO L226 Difference]: Without dead ends: 396 [2020-10-13 23:30:23,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:30:23,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2020-10-13 23:30:23,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 395. [2020-10-13 23:30:23,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-10-13 23:30:23,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 560 transitions. [2020-10-13 23:30:23,115 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 560 transitions. Word has length 133 [2020-10-13 23:30:23,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:23,115 INFO L479 AbstractCegarLoop]: Abstraction has 395 states and 560 transitions. [2020-10-13 23:30:23,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:30:23,115 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 560 transitions. [2020-10-13 23:30:23,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-13 23:30:23,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:23,117 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:23,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 23:30:23,117 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:23,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:23,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1748300644, now seen corresponding path program 38 times [2020-10-13 23:30:23,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:23,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805603667] [2020-10-13 23:30:23,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:23,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:23,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:26,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:28,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:28,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-13 23:30:28,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:30:28,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 23:30:28,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:28,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:28,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 23:30:28,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-13 23:30:28,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-13 23:30:28,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:28,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:28,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:28,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:28,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:28,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:28,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:28,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:30:28,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:28,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:28,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:28,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:28,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:28,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:28,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-10-13 23:30:28,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:28,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:28,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:28,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:30:28,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:28,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:30:28,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:28,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:28,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:28,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:30:28,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:28,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:30:28,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 2 proven. 852 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2020-10-13 23:30:28,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805603667] [2020-10-13 23:30:28,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:30:28,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 23:30:28,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849453443] [2020-10-13 23:30:28,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 23:30:28,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:28,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 23:30:28,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:30:28,664 INFO L87 Difference]: Start difference. First operand 395 states and 560 transitions. Second operand 30 states. [2020-10-13 23:30:33,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:33,106 INFO L93 Difference]: Finished difference Result 1884 states and 2770 transitions. [2020-10-13 23:30:33,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-10-13 23:30:33,107 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 135 [2020-10-13 23:30:33,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:33,113 INFO L225 Difference]: With dead ends: 1884 [2020-10-13 23:30:33,113 INFO L226 Difference]: Without dead ends: 1678 [2020-10-13 23:30:33,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1583 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2136, Invalid=4344, Unknown=0, NotChecked=0, Total=6480 [2020-10-13 23:30:33,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2020-10-13 23:30:33,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 419. [2020-10-13 23:30:33,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2020-10-13 23:30:33,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 598 transitions. [2020-10-13 23:30:33,153 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 598 transitions. Word has length 135 [2020-10-13 23:30:33,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:33,153 INFO L479 AbstractCegarLoop]: Abstraction has 419 states and 598 transitions. [2020-10-13 23:30:33,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 23:30:33,153 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 598 transitions. [2020-10-13 23:30:33,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-13 23:30:33,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:33,154 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:33,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 23:30:33,155 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:33,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:33,155 INFO L82 PathProgramCache]: Analyzing trace with hash 280162479, now seen corresponding path program 39 times [2020-10-13 23:30:33,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:33,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175027735] [2020-10-13 23:30:33,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:33,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:33,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:33,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking...